%0 Journal Article %A M.J. Huang %T On the ergodic limits for unitary periodic propagators. %J Semigroup forum %D 1996 %P 325-334 %V 52 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/SF_1996__52_3_135458/ %F SF_1996__52_3_135458